blocked when writing from the mmaped buffer
of the same page
Care to write a xfstests test for this behaviour?
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Excerpts from Zhong, Xin's message of 2010-12-13 03:26:04 -0500:
I have sent my test case to xfs mailing list (No. 248).
Please help to review it. Thanks!
You btrfs patch is now in the master branch of the btrfs unstable tree.
Thanks!
-chris
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: [PATCH] Btrfs: pwrite blocked when writing from the mmaped buffer
of the same page
Excerpts from Zhong, Xin's message of 2010-12-13 03:26:04 -0500:
I have sent my test case to xfs mailing list (No. 248).
Please help to review it. Thanks!
You btrfs patch is now in the master branch of the btrfs
?
Thanks!
-Original Message-
From: Zhong, Xin
Sent: Tuesday, December 07, 2010 4:00 PM
To: linux-btrfs@vger.kernel.org
Cc: Zhong, Xin
Subject: [PATCH] Btrfs: pwrite blocked when writing from the mmaped buffer of
the same page
This problem is found in meego testing:
http://bugs.meego.com
] Btrfs: pwrite blocked when writing from the mmaped buffer
of the same page
The other filesystems such as ext3 do not have this problem since they are
using generic_file_buffered_write(). And this problem is fixed back in 2007 for
generic_file_buffered_write():
http://lkml.org/lkml/2007/2/4/26
I
This problem is found in meego testing:
http://bugs.meego.com/show_bug.cgi?id=6672
A file in btrfs is mmaped and the mmaped buffer is passed to pwrite to write to
the same page
of the same file. In btrfs_file_aio_write(), the pages is locked by
prepare_pages(). So when
btrfs_copy_from_user() is
writing from the mmaped buffer of
the same page
This problem is found in meego testing:
http://bugs.meego.com/show_bug.cgi?id=6672
A file in btrfs is mmaped and the mmaped buffer is passed to pwrite to write to
the same page
of the same file. In btrfs_file_aio_write(), the pages is locked
?
Thanks!
-Original Message-
From: Zhong, Xin
Sent: Tuesday, December 07, 2010 5:25 PM
To: linux-btrfs@vger.kernel.org
Cc: Zhong, Xin
Subject: [PATCH] Btrfs: pwrite blocked when writing from the mmaped buffer of
the same page
This problem is found in meego testing:
http://bugs.meego.com
Care to write a xfstests test for this behaviour?
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the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
This problem is found in meego testing:
http://bugs.meego.com/show_bug.cgi?id=6672
A file in btrfs is mmaped and the mmaped buffer is passed to pwrite to write to
the same page
of the same file. In btrfs_file_aio_write(), the pages is locked by
prepare_pages(). So when
btrfs_copy_from_user() is
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